Internally-driven odometer



March 1-6 1926. 1,577,069

J,- K. OLSEN INTERNALLY DRIVEN ODOMETE R Filed June 26, 1922 L]& fin f". 0160/14 15 enclosed within the dial wheels.

Patented Mar. 16, 192 6.

UNITED STATES PATENT v OFFICE.

JOHN K. OLSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO STEWART-WARNER SPEEDOM- ETER CORPORATION, OF CHIOAGO, ILLINOIS, A CORPORATION OF VIRGINIA,

IN TERNALLY DRIVEN ODOMETER.

Application 'filed June as, 1922, Serial No. 570,957.

6 the State of Illinois, have invented certain new and useful Improvements in Internally- Driven Odometers, of which the following is' a specification, reference being hadeto the accompanying drawings, forming a part 10 thereof.

The purpose of this invention is to provide an improved construction in a revolution counting train of the type in which the gears for carrying from dial to dial are It consists in the elements and features of construction shown and described, as indicated in the claims.

' In the drawings:

Figure 1 is a partly sectional'side elevation of a portion of a revolution counting train of dial wheels embodying this invention, section being made radially through the upper half of the dial wheels and with 25 respect to the lower portion of one of them.

Figure 2 is a perspective View of one of the dial wheels, looking at the outeror right hand side of the web. v

Figure 3 is a similar view of the same,

80 looking at the opposite side.

' Figure 4 is a perspective view of the mutilated gear member of the dial wheel.

Figure 5 is a perspective v1ew of the carrying pinion, comprising 'two parts. 5 which are separately shown in perspectwe view Figures 6 and 7.

Figure 8 is a perspective view of the carrying pinion supporting arm.- The structure shown in the drawings is a portion,comprising only two dials,-of a counter train embodying the invention, withoutshowing of the driving means nor supporting structure, which may be of any form or character described. It may be understood that the initial dial wheels shown in the drawings may be driven in any manher and from any source. This invention is concerned only with the construction of the dial wheels themselves, and the connecting gear mechanism in and part thereof; and this will now be. described.

1 is a main axle or shaft upon which the dial wheels, 2, 2, are mounted side by side. Each of the dial wheels in its entirety comprises a driving and a driven gear member,

of which the driving gear is a mutilated and the driven gear is an unmutilated or complete gear. The dial wheel in its entirety, comprises further, a web which carries the two gear members above mentioned, and which has a peripheral flange which encloses theentire gear mechanism and which exteriorly has the dial numerals or other marking.

The means for carrying from dial to dial comprises a carrying pinion in each carrying train; and these carrying pinions are each journale-d upon a carrying pinion .support which extends rigidly from the-shaft, 1, within the dial wheel, so that the carrying trains in their entirety, are enclosed within and between the dial wheels. r

The detail construction is designed with a view to making the parts of metal stamplngs as far as possible; and with a view to this method of production, the construction is designed in detail for eliminating as far as possible the back lash-or play between the intermeshing parts of the gear train, and thereby insuring, or rendering it possible to msure, correct alignment of the numeral markings of the several dial wheels.

Each dial wheel comprises, as stated, a web, 2", having a central aperture by-which it ismounted on the shaft, 1; and for the. purpose of such mounting and for afi'ording as broad a bearing as possible upon the shaft, this web is flanged around the. central opening, as seen-at 2, such .flange being turned outwardly. The mutilated driven gear member of thedial wheel is formed by striking outwardly from the web, 2, gear teeth, 2, in a continuous circular series, as seen-in Figure 2, the entire series being treated as constitutinga gear member, as indicated by the numeral 20, and comprising twenty teeth. The driving ear, which is the mutilated gear member 0 the dial wheel, is formed as a separate piece, J shown in Figure 4, being stamped from of the gear member, 4. These bosses, 2, 10

may be dimensioned for drive fit in the apertures, 4, thus dispensing with any heading down for completing the securement of the gear member, 4, to the web,

2. Said imutilatedor driving gear mem her, 4', has struck laterally from it at a short segment of its margin, two gear teeth, 4, the notches, 40, being cut in the margin of the disk; and in the process of striking out laterally the teeth, 4, as described,

, there is formed in the zone of the original stitutes the mutilated driving gear, 4, is flanged around its shaft-accommodating aperture, as seen at 4, said flange being turned inwardly with respect to the dial wheel, that is, so as to project in "the opposite direction from the flange, 2, of the dial wheel web, 2*; and by this means there is afforded to the said dial wheel an additional length of bearing on'the shaft, substantially equalto the bearing which is extended in the other direction by means of the flange, 2*.

The carrier pinion in each of the dial wheels is carried by an arm, 3, rigid with the shaft, 1, said arm being engaged with the shaft by a spline, 3 projecting into the central aperture, engaging a longitudinal groove, 1*, in the shaft.

The carrying pinion comprises a driving gear member, 5, and a driven gear member, 6, the latter having associated with it the delay member, 7, the latter being starsha ed and consisting substantially of three teet which are extensions of alternate teeth of the six teeth which constitute the gear member, 6. The entire carrying pinion comprising the parts, 5' and 6, operates as a unit, being rigidly united in operation, but bemg formed in two parts, as seen.

in Figures 6 and 7, in order that the entire carrying pinion may have its journal bearing between. the two gear members of said carrying pinion; and for this purpose the part, 6, is formed with a centrally projecting axle, 6 which is reduced diameter at its extremity, as seen. in 6, the nnreduced ortion being the journal for journalirig' it as a unit at 3, in the carrymg arm, 3, the driven gear member, 6, having its central aperture c lia-metered for drive fit upon the reduced gear portion, 6, of said axle.

In assembling the carrying pinion as unit, it is mounted as descri': ed on can rying arm, 8, and this carrying passed onto the shaft through the open side of the dial wheel to bring the drivi member into operative relation throu driving and mutilated gear menib unmutilated gear element, 6, being i into the plane or zone of the gear g h the ma" s it pinion.

consisting of two teeth, 4, of the driving mutilated gear, .4,'and the delay element, 7, with its three teeth being brought 1nto the plane or zone of the disk, 4, whose circular periphery constitutes the delay surface, and whose notch, '4", constitutes the clearance for -co-operation with the star-shaped delay element of the carrying pinion, in a manner requiring no description.

\Vhen thus adjusted Within the cavity of the dial wheel, the driven gear element, 5, of the carrying pinion stands within the plane or zone of the driven gear member of the next adjacent dial wheel, that is, in the plane of rotation of the outwardly struck teeth, 2 with which the teeth of the gear members, 5, mesh for driving said next adjacent dialwheel.

The cooperation of the mutilated driv ing gear member, 4, comprising the offset gear segment, 4*, with the delay element, 7 and the gear element, 6, of the carrying pinion, for communicating rotation to the extent of two teeth of said carrying pinion upon each revolution of. the mutilated driv ing gear member, 4, and for locking the carrying gear against rotation in the intervals of the engagement of the gear segment, 4*, with the gear member, 6, of the carrying member, will be understood from the drawings without further description, being in accordance with the familiar method of reduced speed transmission by mutilated gear devices. Upon consideration, it will be seen that the construction described makes it poswhatever lost motion may actually be found to exist in the carrying train, tending to cause misalignment at the numerals upon the dial wheels, by a slight misalignment of the teeth as members, 3' and 6, of the carrying pin.

revolution counting device comprisg and dial wheels assembled thereon side by side, the dial wheels comprising each tiiated and an unmutilatcd gear element zones lateral with respe t to each sin '5 having carrying'pinion supending between the dial wheels, 'n pinions journaled on said supports o a driving and a driven element for cooperating respectively with the unmutilated and the mutilated gear elements of the dial wheels, the, said -"elements of the dial-wheels .beingof external gear or peripherally toothed'type' and the web of the dial wheels being. dianietered to extend beyond the pinion gear element;

whereby without thefinternal gear, the dial wheels may have lateral peripheral flanges for the dial markings, encompassing and en-' closing all the gear elements.

2. A revolution counting device comprising a shaft and dial wheels assembled side by side there-along, the dial wheels comprising each a mutilated and an unmutilated gear element, and a web which carries said two elements, the shaft having carryin 'epinion supports extending between the ial wheels, and carrying pinions'jour- -naled in said supports, comprising each a driving and a driven gear element for cooperating respectively with the unmutilated and the mutilated gear elements of the dial wheel, :said carrying pinions being journaled on said supports between said driv and driven elements respectively, of the pinion, the webof the dial wheels being .of cup form with gear elements for carrying from dial to (1181 contained within the cup flange, oneof the gear elements of the dial wheel being a separate part from and applied and secured on the inner side of the web of the wheel, said web being outwardly flanged around its center hole for 'the shaft, the interiorly applied gear cle ment being similarl flan ed in the op )0- site direction aroun the sfiaft-accommo ating hole, whereby the dial wheel obtains. a long bearing on the shaft extending both 'ways from the web.

- In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 21 day i of J une,- 1922. V I

' JOHN K. OLSEN; 

